What are the aspects of the role and significance of soil as a resource to human society?

The role of soil for humans is mainly:

1. Soil provides essential nutrients and water for plants, and is also the habitat for soil animals, so human beings get the basic conditions for survival;

2. The development of various industries of the national economy is inseparable from land. Sufficient, high-quality and reasonably distributed land is one of the necessary conditions for the smooth development of the national economy of mankind;

3. Land is the core relationship in human production relations. In human economic life, land ownership determines the production relations based on land ownership, that is, the mutual relations and distribution relations between people in the process of reproduction.

4. When other conditions are constant, the quantity, quality and distribution of land determine the population load of land and the quality of human life on average.

Soil – Habitat for organisms.

The habitat on which soil animals depend, and the soil meets the basic conditions of human clothing, food, shelter and transportation.

Soil – Nurturing plants.

The quality of the soil basically determines the essential characteristics of the plant ecosystem, the so-called "one side of the water and soil to support the other side", what kind of land, what kind of food is grown. The soil provides essential nutrients and water to plants.

Soil – a natural medium.

Soil contains a large number of microorganisms, and the bacteria in the soil come from autotrophic and saprophytic bacteria that naturally live in the soil, as well as bacteria that enter the soil with animal excrement and their carcasses. Most of them are found in the soil at a depth of 10 to 20 cm above the ground. The deeper the soil layer, the lower the number of bacteria, and the bacteria exposed to the surface of the soil layer are not conducive to their survival due to sunlight exposure and drying, so the number of bacteria is small.

Soil is the foundation of people's livelihood.

The development of various industries of the national economy is inseparable from land. Sufficient, high-quality and reasonably distributed land is one of the necessary conditions for the smooth development of the national economy of mankind;

Soil – affects the standard of living.

When other conditions are constant, the quantity, quality, and distribution of land determine the population load of land and the quality of average human life.

1. Soil is the base of agricultural production; 2. Soil is an important component of the natural geographical environment of the earth's surface system; 3. Soil is the foundation of the Earth's terrestrial ecosystem; 4. Soil is the most precious natural resource.

Soil not only provides essential nutrients and water for plants, but it is also a habitat for soil animals.

The microorganisms in the soil are mainly bacteria, followed by actinomycetes, fungi, spirochetes, etc. The vast majority of microorganisms in the soil are beneficial to people, they participate in nature's material cycle, decompose animal carcasses and excrement; fixes nitrogen in the atmosphere for plant use; Many microorganisms that produce antibiotics can be isolated from the soil.

Function: Soil minerals are mineral particles of different sizes (sand, soil and gum) formed by the weathering of rocks. There are many types of soil minerals, and the chemical composition is complex, which directly affects the physical and chemical properties of the soil, and is one of the important nutrients of crops.

Solid soil particles composed of minerals and humus are the main body of the soil, accounting for about 50% of the soil volume, and the pores between the solid particles are occupied by gas and water.

The vast majority of soil gas is oxygen and nitrogen entering the atmosphere, and a small part is carbon dioxide and water vapor produced by life activities in the soil. The moisture in the soil enters the soil mainly from the surface and includes many dissolved substances.

There are also various animals, plants, and microorganisms in the soil.

The influence of human production activities on soil formation cannot be ignored, which is mainly manifested in the formation and evolution of soil by changing the soil-forming factors. The most prominent example is agricultural production, which replaces natural vegetation with annual herbaceous crops such as rice, wheat, maize, and soybeans. Therefore, human beings change the structure, water retention, and aeration of the soil through cultivation; Changing soil moisture and temperature conditions through irrigation; Depriving the soil of some of the organic matter that should have been returned to the soil through the harvesting of crops, changing the nutrient cycling of the soil; The nutrient loss is supplemented by the application of chemical fertilizers and organic fertilizers, thereby changing the nutrient composition, quantity and microbial activity of the soil.

Eventually, natural soils are transformed into various types of cultivated soils. The positive impact of human activities on soils is the cultivation of some fertile, high-yield cultivated soils, such as paddy soils; At the same time, human activities have also caused negative effects of soil degradation such as fertility decline, soil erosion, salinization, swamping, desertification and soil pollution due to the violation of the laws of natural soil formation processes.

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Human activities have a unique role in the process of soil formation, which can affect the formation speed, degree and direction of soil formation, and have a rapid and profound impact on soil formation. Human activities are fundamentally different from the five major soil-forming factors of parent material, climate, biology, topography and time, and cannot be regarded as the sixth factor. This is because:

1) The impact of human activities on soil is conscious, purposeful and directional;

2) Human activities are social and influenced by social systems and social productivity;

3) the impact of human activities can be exerted by altering various natural factors;

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Answer: Status and BAI

Function: Soil DU is an integral part of the earth's surface system, which refers to the loose layer of green plants that can grow on the surface of the earth, and is located at the interface and interaction intersection zone of the human wisdom sphere, atmosphere, hydrosphere, biosphere and lithosphere, and is the central environmental link connecting the organic and inorganic worlds, and is also the link that combines the various components of the geographical environment.

The relationship between soil and people: It provides coordinated water, nutrients, temperature, air and other nutrients for green plants to photosynthesize, and provides food and fibrous materials to humans and terrestrial animals, so soil is an important natural resource for human development; Through the process of soil formation and development, pollutants and wastes in the human living environment are decomposed and purified, so the soil is not only the head of the food chain of the terrestrial ecological system, but also the purifier to maintain the quality of the living environment.